Stationary-steam-plant reserve



Jan. 29, .1929. 1,700,648

J. RUTHS ET AL STATIONARY STEAM PLANT RESERVE Filed March 22, 1925 Patented Jan. 29, 1929.

.ToHANiInsRUTHs, or DJURSHOLM, A'NDNILS HEZEKIEL rannnn, or srocnno-mvi,

SWEDEN, ASSIGNORS 'l0- BUTHS AGCUMULATOR SWEDEN, A CORPORATION OF SWEDEN.

AK riEBoLAe, or STOCKHOLM,.

s'rA IQN JaY-sTEAM-PLANT RESERVE.

Application filed March 22, 1923, Serial No. 626,937, and in Sweden March 22, 1922.

Our invention relates to stationary steam plants provided with reserve boilers forgencrating steam when insufficient power is delivered by the normally operating units.

Such reserve boilers mustbe put into service quickly. To facilitate a quick start such boilers are often maintained filled with water and under fire to keep the water hot. However a boiler can not be well insulated 2LI1C loses much heat through radiation. V

Our invention has for its object" to save heat in such a plant while at the same time permitting a rapid starting of reserve boilers by providing a receptacle which is heavily insulated and holds hot water which hot water is conducted to the boiler when it isto be fired up, whereby steam can be raised in a short time and, further, in returning the hot water from the boiler to the receptacle when the boiler is cut out of service, whereby the water is maintained at a high temperature so that it can be used again when the reserve boiler is to be placed in service.

The saving thereby effected is the diiference in radiation losses between the well insulated receptacle and the poorly insulated boiler. i

The invention is illustrated in the accompanying drawing in which a designates a re serve or stand-by boiler which normally held unfired and empty. 6 designates a receptacle surrounded by an insulating layer 0, situated "above boiler a and normally filled with hot water. When the load is too heavy for the main pow-er supply of the plant so that the. reserve boiler a must be fired up,

valve Z in conduit 79 is opened, valve 7 incon- When the boiler a is again to be cut out I of service, valve f or Z or bothare opened and the pressure in boiler a f0 *ces waterinto receptaole buntil the pressure is equal in the two. If preferred, pump 79 is putinto operation and valves fand Z closed, whereby water been emptied or as much has been transferred as desired. Valve 0 permits connection of receptacle 6 with the atmosphere.

What we claim is:

1. In a steam plant, a reserve boiler, a storage receptacle of large capacity adapted to contain sufiicient hotwater to initially charge said reserve boiler, a conduit connecting the lower portionof said'boiler and the lower portion of said receptacle, a valve in said conduit, and means for transferring Water from said boiler to said receptacle and from saidreceptacle to said boiler, as desired.

2. In a steam plant, a reserve boiler, a storage receptacle of large capacity located above said reserve boiler and adapted to contain suflicient hot water to initially charge said reserve boiler, a conduit connecting the lower portion of said boiler and the lower portion of said receptacle, a valve in said conduit,

is forced into receptacle 6 until boiler. a has means for transferring Water from said boiler to said receptacle comprising a pump, and 1 means for transferring water from said receptacleto said boiler.

3. In a steam plant, a reserve boiler, a storage receptacle of large capacity 'adaptedto contain suificient hot water to initially charge said reserve boiler, a conduit connecting the lower portion of said boiler and the lower portion of said receptacle, a conduit connecting saidboiler to the upper portion of said receptacle, valves in said conduits, and means for transferring water from said boiler to said receptacleand from said receptacle to 2 

